Park at the Riondettes car park, located at the end of the road leading to La Ruchère.
(S/E) Take the path on the right (west) which easily joins the Col de la Sarriette via a pretty path that winds around the rocky depressions.
(1) Descend the pass towards Pertuis, join the forest road and continue to the Belvédère de Pertuis viewpoint on the right. Enjoy a beautiful view of the Saint-Laurent-du-Pont valley.
(2) Retrace your steps and continue along the path that climbs towards Arpison, leaving the path from Fetrus to Cellière to reach the passage between the rocks of Pertuis.
(3) Keep heading south-east, leaving the forest shortly afterwards to enter a clearing. Reach the crossroads leading to the Belvédère d'Arpison viewpoint in the clearing of the same name.
(4) Take the path on the right to reach the viewpoint. Enjoy the long view.
(5) Return to the previous crossroads.
(4) Turn right and then very quickly left onto the path heading due north. Continue through the forest, ignoring all paths branching off to the right or left, to return to the car park where you started (S/E).
but be careful between points 1 and 2, as the path quickly becomes slippery. My girlfriend, who isn't very sure-footed, started to slip on a narrow section and I just managed to catch her! It was quite a scare because it would have been a nasty fall 